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UB4W

High-Entropy Materials HEA Traditional Materials TRA

MP-ID: mp-865423 · Space group: Pbam (#55)

Basic Information

Formula
UB4W
MP-ID
mp-865423
Elements
3
Sites
24
Density
12.4661
g/cm³
Volume
247.82
ų
Cell a
5.9103
Å
Cell b
11.4506
Å
Cell c
3.6619
Å
α Angle
90.00
°
β Angle
90.00
°
γ Angle
90.00
°
Space Group
Pbam
Point Group
mmm
Crystal System
Orthorhombic
Bravais Lattice
Orthorhombic P
Stability
No
Packing Fraction
0.5240

X-ray Diffraction

Diffraction Pattern
X-axis: 2θ (°); Y-axis: relative intensity; CuKa ; λ=1.5406 Å
Diffraction Peaks (Top 24)
2θd (Å)Ihkl
24.31 3.6619 100.0 (0,0,1)
27.82 3.2064 8.7 (1,3,0)
27.82 3.2064 8.6 (1,-3,0)
31.25 2.8627 32.9 (0,4,0)
31.26 2.8614 28.6 (2,1,0)
31.26 2.8614 28.6 (2,-1,0)
34.82 2.5764 11.0 (1,4,0)
34.82 2.5764 11.0 (1,-4,0)
37.27 2.4123 4.9 (1,-3,1)
37.27 2.4123 4.9 (1,3,-1)
37.27 2.4123 4.9 (1,3,1)
37.28 2.4123 4.9 (1,-3,-1)
38.53 2.3367 12.7 (2,3,0)
38.53 2.3367 12.7 (2,-3,0)
39.98 2.2553 19.5 (0,4,-1)
39.98 2.2553 19.5 (0,4,1)
39.99 2.2547 17.1 (2,-1,1)
39.99 2.2547 17.2 (2,1,1)
39.99 2.2547 17.2 (2,1,-1)
39.99 2.2547 17.1 (2,-1,-1)
42.33 2.1354 2.2 (1,5,0)
42.33 2.1354 2.2 (1,-5,0)
42.92 2.1071 7.2 (1,-4,1)
42.92 2.1071 7.1 (1,4,-1)
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Energy Properties

Formation Energy/atom
-0.50187
eV/atom
Energy/atom
-8.99639
eV/atom
Energy above Hull
0.0016
eV/atom
Uncorrected Energy
-8.9964
eV/atom
Volume/atom
10.33
ų
c/a Ratio
-

Electronic Properties

Metallic
Metal
Band Gap
0
eV
Direct Gap
No
CBM
N/A
eV

Magnetic Properties

Magnetic
Yes
Total Mag. Moment
6.2704
μB
Mag. Ordering
Unknown
Mag. Sites
0
Magnetization/Volume
0.025300
μB/ų

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
B · 0.667
Element Family
Metalloid-Nonmetal
Solute Fraction
0.333
Interstitial Fraction
0.667

High-Entropy Alloy Features

Composite Radar (normalized)
Element-Class Share
Mix Entropy ΔS/R
0.8676
HEA criterion (>1.0 = high entropy)
Mix Entropy ΔS
7.2129
J/mol·K
Ω Parameter
0.8713
Ω > 1.1 favors solid solution
Atomic Size Mismatch δr
29.599%
δr < 6.6% favors single-phase solid solution
Electronegativity Diff Δχ
0.2940
smaller = more stable mixing
VEC
3.600
valence electron concentration, affects phase stability
Mix Enthalpy ΔH_mix
-20.000
kJ/mol; negative = exothermic mixing
Entropy Norm
0.7897
SS Former
0
Phase Tendency
AM

Traditional Material Features

ROM Blended-Feature Radar
Rating & Classification
Tier
B
Score
0.585
Family
Interstitial Alloy
Matrix Element
B · 0.667

Related Tasks

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-865423
Reference Citation

The crystal structure and related material properties of UB4W were obtained from the Materials Project database (MP-ID: mp-865423, database version v2026.04.13).

Literature Citation

Horton, M.K., Huck, P., Yang, R.X. et al. Accelerated data-driven materials science with the Materials Project. Nat. Mater. 24, 1522–1532 (2025). https://doi.org/10.1038/s41563-025-02272-0

BibTeX
@article{Horton2025,
  author  = {Horton, Matthew K. and Huck, Patrick and Yang, Ruo Xi and Munro, Jason M. and Dwaraknath, Shyam and Ganose, Alex M. and Kingsbury, Ryan S. and Wen, Mingjian and Shen, Jimmy X. and Mathis, Tyler S. and Kaplan, Aaron D. and Berket, Karlo and Riebesell, Janosh and George, Janine and Rosen, Andrew S. and Spotte-Smith, Evan W. C. and McDermott, Matthew J. and Cohen, Orion A. and Dunn, Alex and Kuner, Matthew C. and Rignanese, Gian-Marco and Petretto, Guido and Waroquiers, David and Griffin, Sinead M. and Neaton, Jeffrey B. and Chrzan, Daryl C. and Asta, Mark and Hautier, Geoffroy and Cholia, Shreyas and Ceder, Gerbrand and Ong, Shyue Ping and Jain, Anubhav and Persson, Kristin A.},
  title   = {Accelerated data-driven materials science with the Materials Project},
  journal = {Nature Materials},
  year    = {2025},
  volume  = {24},
  number  = {10},
  pages   = {1522--1532},
  month   = {oct},
  doi     = {10.1038/s41563-025-02272-0},
  issn    = {1476-4660},
  url     = {https://doi.org/10.1038/s41563-025-02272-0},
  abstract = {The Materials Project was launched formally in 2011 to drive materials discovery forwards through high-throughput computation and open data. More than a decade later, the Materials Project has become an indispensable tool used by more than 600,000 materials researchers around the world. This Perspective describes how the Materials Project, as a data platform and a software ecosystem, has helped to shape research in data-driven materials science. We cover how sustainable software and computational methods have accelerated materials design while becoming more open source and collaborative in nature. Next, we present cases where the Materials Project was used to understand and discover functional materials. We then describe our efforts to meet the needs of an expanding user base, through technical infrastructure updates ranging from data architecture and cloud resources to interactive web applications. Finally, we discuss opportunities to better aid the research community, with the vision that more accessible and easy-to-understand materials data will result in democratized materials knowledge and an increasingly collaborative community.}
}

3D Crystal Structure Rendering

Loading 3D structure…

Style: Ball & Stick
Raw CIF Data
# generated using pymatgen
data_UB4W
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.91029569
_cell_length_b   11.45062995
_cell_length_c   3.66184598
_cell_angle_alpha   90.00102326
_cell_angle_beta   89.99911680
_cell_angle_gamma   89.99978989
_symmetry_Int_Tables_number   1
_chemical_formula_structural   UB4W
_chemical_formula_sum   'U4 B16 W4'
_cell_volume   247.82131799
_cell_formula_units_Z   4
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  U  U0  1  0.12646399  0.15043782  0.00000093  1.0
  U  U1  1  0.87353510  0.84955130  0.00000055  1.0
  U  U2  1  0.62646359  0.34947996  0.00000067  1.0
  U  U3  1  0.37351918  0.65052615  0.00000059  1.0
  B  B4  1  0.47385837  0.19318733  0.50000083  1.0
  B  B5  1  0.52614041  0.80680969  0.50000045  1.0
  B  B6  1  0.97385560  0.30675166  0.50000077  1.0
  B  B7  1  0.02617624  0.69323889  0.50000056  1.0
  B  B8  1  0.36699659  0.46860254  0.50000048  1.0
  B  B9  1  0.63298657  0.53139426  0.50000062  1.0
  B  B10  1  0.86699472  0.03140072  0.50000056  1.0
  B  B11  1  0.13300613  0.96861568  0.50000090  1.0
  B  B12  1  0.29060253  0.31254106  0.50000014  1.0
  B  B13  1  0.70937097  0.68745462  0.50000110  1.0
  B  B14  1  0.79060347  0.18740129  0.50000073  1.0
  B  B15  1  0.20940253  0.81259409  0.50000054  1.0
  B  B16  1  0.38519756  0.04711378  0.50000077  1.0
  B  B17  1  0.61480068  0.95289633  0.50000057  1.0
  B  B18  1  0.88518599  0.45287849  0.50000065  1.0
  B  B19  1  0.11482961  0.54711724  0.50000062  1.0
  W  W20  1  0.13629663  0.40914864  0.00000131  1.0
  W  W21  1  0.86371356  0.59086567  0.00000006  1.0
  W  W22  1  0.63636596  0.09082073  0.00000084  1.0
  W  W23  1  0.36364101  0.90916805  0.00000075  1.0
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